Douglas A. Wielunski

Follow

Person

Waterford, WI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Oil-less pressure relief valves
- Patent number 9,187,229
- Issue date Nov 17, 2015
- Plitek, L.L.C.
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Oil-less pressure relief valves
- Patent number 8,783,292
- Issue date Jul 22, 2014
- Plitek, L.L.C.
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Oil-less and wetted pressure relief valves having an integrated filter
- Patent number 8,636,034
- Issue date Jan 28, 2014
- Plitek, L.L.C.
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Patents Applicationslast 30 patents

Information Patent Application
OIL-LESS PRESSURE RELIEF VALVES
- Publication number 20140318653
- Publication date Oct 30, 2014
- PLITEK, LLC
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
Oil-Less and Wetted Pressure Relief Valves Having an Integrated Filter
- Publication number 20130048125
- Publication date Feb 28, 2013
- PLITEK, LLC
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
Oil-less pressure relief valves
- Publication number 20130048635
- Publication date Feb 28, 2013
- Plitek, L.L.C.
- Karl K. Hoffman
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL